Double layer capacitance of Pt(111) single crystal electrodes

被引：200
|
作者：
Pajkossy, T [1 ]
Kolb, DM [1 ]
机构：
[1] Univ Ulm, Dept Electrochem, D-89069 Ulm, Germany
来源：
ELECTROCHIMICA ACTA | 2001年 / 46卷 / 20-21期
关键词：
platinum; impedance; double layer; capacitance; diffusion; potential of zero charge;
D O I：
10.1016/S0013-4686(01)00597-7
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In order to determine the double layer capacitance of the Pt(111) electrode, impedance and capacitance measurements were carried out in neutral and acidic aqueous perchlorate solutions. Separation of the double layer and adsorption contributions of the interfacial capacitance were based on the adsorption impedance theory. The double layer capacitance versus potential plot exhibits a peak at about 0.12 V versus SCE in the 1.5-7 pH range; from here towards cathodic potentials the capacitance attains a value of about 20 muF/cm(2). The peak may be related to the potential of zero free charge of the Pt(111) electrode. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：3063 / 3071
页数：9
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